Automatic filling nozzle



March 22, 1938. H. K. FLINCHBAUGH AUTOMATIC BILLING NOZZLE Filed Sept. 16 1956 I I I J l l I I:

1NVENTOR. fiznry iifZmahZmu h ATTORNEYS.

Ki M @W Patented Mar. 22, 1938 1 1' g 11 UNITED STATES PATENT OFFICE I 2,111,851 i if AUTOMATIC FILLING NOZZLE Henry K. Flinchbaugh, fork, Pa; Application September 16, 1936, Serial No; 101,022 12 Claims. (01. 226-127) 1 My invention relatesflto automatic valves and cause a convergenceof the fluid stream into the particularly to ones whichare actuated to close internal nozzle} in which a valve'seat ll-is by the submergence of the nozzle in the liquid formed. This convergence makes the internal which has been discharged intofa receptacle. nozzle 5.by the constriction Still more specifically, myin'vention is concerned On theend of the valve stem Ill is a piston I2 5 with automatic valves for gasoline dispensing which works in the cylinder 4 in an obvious nozzles which automatically stop the flow of manner. Around thestem I I] is a coil spring I gasoline when the gasoline in the container being urging the piston l2 upward and the valve 3 filled submerges the end of the dispensing nozzle. open, 7 In order to avoid the danger of fluid col- 1 10 I am aware of a number of valves of this genlecting in the cylinder 4, a drainage conduit 13 is 10 eral type directed to my general purpose but my provided. This conduit 13 leads out through a invention 1 has certain definite advantages over hole in adjustment screw I6 by which the sensi- 1 the present state of the art. The use" of an electivity of the valve is regulated. The farther the i trically operated .mechanism to automatically screw l6 projects, the greater impediment it is 16 control valves has been suggested in the art as to the fluid stream through the valve 3. When i has the float type of automatic control. Howa greater portion of the screw I6 is exposed to ever, the use of electricity in close proximity to the pressure of the fluid stream, it is clear that gasoline is undesirable and the float type of conthe resolved force urging the screw l6 downward trol has not the simplicity and positiveness of against the pressure of spring I is correspondingly 20 operation which is possible in my invention. increased. The angle of the fluid stream im- 2 i The object of my invention, therefore, is the pinging on the screw l6 causes this resultant provision of a simple and positively operating downward force. Hence the sensitivity of the automatic valve for the nozzle of a gasoline disautomatic operation ofthe valve 3 may be regu pensing unit, whichcan bede'pended upon to lated by varying this resultant force through shut off the flow of gasoline when the end of the changing the. degree of projection of the screw [6. 25 nozzle becomes submerged. A plug screws into the end of cylinder 4 as a Other objects and advantages will appear from cylinder head l4. An inlet port I5 is drilled the following detailed description of a preferred axially through the cylinder head I4 and reembodiment :of my invention, reference being ceives a sliding valve 20 therein. The sliding had to the accompanying drawing. valve 20 is enlarged at its inner end to prevent its 0 Fig. I is a side view of anozzle and hand valve, coming out of place and has a central conduit partially in section to show the automatic valve 2| which has a plurality of openings 22 at the of .my invention placed in the end of the nozzle, inner end of the conduit 2|. The conduit 2| at its the automatic ,valve being open. outer end takes a radial course so that the con-. II is a side view in section of'the autoduit 2| is closed when the sliding valve 2!] slides :15 matic valve portion of the nozzle shown in Fig. I, into the inlet port 15. An exhaust port 25 is with the automatic valve closed. formed in the cylinder. 4 and this port 25 is Fig. III is'a sectional view taken about thelines continued by tube 26 to its point of discharge in III-III of Fig. I. I i annular recess 21 formed in the spray control 40 Fig.IV is a sectional view taken about the lines tube 6. The cylinder 4 has three supporting ele- 4o IVIV of Fig. I. 1 ments 28, see Fig. III, running longitudinally to Fig. V is a perspective view of the adjustment support the cylinder 4 in place and provide passcrew for adjusting the sensitivity of the autosages 29 for the fluid flow. maticvalve. The internal nozzle 5 is constricted by the For the purposes oi a detailed description of bevel form of the valve 3 as explained above and 4:, the device shownin the drawing, that device may its discharge side is flared to direct the fluid be conveniently analyzed into an outernozzle l stream over and without touching the annular with hand control valve 2, automatic valve 3 havrecess 21, before hitting the wall of spray control ing an operating cylinder 4, an internal nozzle tube 6. The discharge side of the tube 6 is also 5 and a spray control tube 6. slightly constricted by a converging wall to effect 50 The outer nozzle land hand control valve 2 a good fluiddischarge. Two air ports 30 are are of a conventional type and need not occupy formed between the inside of the outer nozzle us. The automatic valve 3 has a stem l0 formed I and the outside of the spray control tube 6, see integrally therewith and extending intothe op- Fig. IV. These ports 30 lead from the end of the 55 crating cylinder 4. The valve 3 is formed to outer nozzle I to the annular space 32 between III the spray control tube 6 and the internal nozzle 5. The function of these air ports 30 is that of breathers which induce the fluid stream discharged from the internal nozzle 5 to follow its natural course over the annular recess 21 without filling up the clearance space between the stream and the spray control tube 6 at its inner end. Dotted lines indicate the normal course of the fluid stream from inner nozzle 5.

The operation of this preferred form of my invention is as follows: When in use, the fluid flows freely through the outer nozzle I under the control of the hand valve 2 in the usual manner. The automatic valve elements are then in the positions shown in Fig. I. The fluid flows through conduits 29, the valve 3 into the internal nozzle 5 where it is constricted, and then the fluid flares out to hit the wall of the spray control tube 6 on the other side of recess 21. Because of the functioning of the air ports 30 as breathers, the fluid stream takes its natural path indicated by the dotted lines from the internal nozzle 5. At the same time the fluid stream is also flowing in through conduit 2| of sliding valve 20 and into the cylinder 4 by means of openings 22, over the top of piston I2 and out through the exhaust port 25 to the annular recess 21 where it mingles with the discharge from the internal nozzle 3.

We now come to the point where the end of outer nozzle I becomes submerged, stopping the functioning of the air ports 30. This causes the fluid stream discharging from the internal nozzle 5 to spread into the recess 21 and back up into exhaust port 25. This results in a pressure being built up on top of piston I2 which is forced ,with valve 3 toward the closed position, Fig. II. This closure is aided by the pressure on the upper face of valve 3 as the valve 3 is separated from the cylinder I by the movement of piston I2. When the valve 3 is closed, the slide valve 20 slides into the inlet port I5, closing the conduit 2| and the inlet port I5. The elements of the automatic valve will then be in the position shown in Fig. II andno fluid will flow until the nozzle I is removed from its partially submerged position and the hand valve 2 closed and opened again. The closure oi hand valve 2 causes the fluid pressure on valve 3 to be withheld or cut oif, and the spring I restores the valve 3 to its open position.

It is clear that this automatic valve is characterized by a simplicity of operation and a positiveness oi. action. The construction is economical and durable, and there are no intricate parts to get out of order. While I have described this preferred embodiment of my invention in detail, it is obvious to one skilled in the art that numerous changes might be made and these modiflcations are deemed to be within the spirit of the invention as hereinafter claimed.

While the preferred embodiment of my invention has been described in its specific application to gasoline dispensing, it is not intended to be restricted thereto, for it has obvious advantages in use with other liquids.

Having thus described my invention, I claim:

1. The combination of an outer nozzle, a closure valve within said nozzle, a pressure means urging said valve open, a closing piston attached to said valve, 'a' cylinder in which said piston operates, said cylinder having an inlet port and an exhaust port, a control valve closing said inlet port when said closure valve is in the closed position, an internal nozzle into which said closure valve opens, a spray control tube positioned at the discharge end of said internal nozzle, said spray control tube having a recess into which said exhaust port opens, an air duct leading from the end of the outer nozzle to a point between said internal nozzle and said recess in the spray control tube, and means for independently closing said outer nozzle.

2. The invention according to claim 1, characterized by the further fact that said internal nozzle is formed to discharge the fluid against the inner wall of the spray control tube at a point on the discharge side of said recess in said spray control tube.

3. The invention according to claim 1, characterized by the further fact that said internal nozzle diverges toward the spray control tube, the spray control tube converges in both directions from the recess and the point of contact of the fluid stream from the internal nozzle on the wall of the spray control tube is on the discharge side of said recess.

4. The invention acco ding to claim 1, characterized by the further fact that said operating cylinder is formed at its lower end to abut against the upper face of the closure valve, said lower end being of an equal or greater area than said upper face of the closure valve.

5. The invention of claim 1, characterized by the further fact that said valve has a means for adjusting the sensitivity of its automatic operation. i v 6. In combination, an outer nozzle, a valve within said nozzle, said valve having a stem, and operating cylinder into which the stem of said valve extends, said valve in the open position fitting against said cylinder so that the upper face is not exposed to the fluid stream, a piston on said stem and within said cylinder, a spring in said cylinder urging said piston to open said valve, an inlet port formed in said cylinder for admitting the fluid stream to the top of the piston, an exhaust port formed in said cylinder for leading the fluid from said piston and past said valve, an internal nozzle on which is formed the seat for said valve, a spray control tube into which said internal nozzle discharges, said tube having an annular recess into which said exhaust port leads, said internal nozzle being formed to direct its discharge stream against the wall of the spray control tube at a place beyond said annular recess, an air duct leading from the end of the outer nozzle to a point between the spray control tube and said internal nozzle and an independent means of closing said outer nozzle.

7. The invention of claim 6, characterized by the further fact that said cylinder has a drain port.

8. The invention of claim 6, characterized by the further fact that said inletport is controlled by a control slide valve which closes the inlet port when the first mentioned valve is closed.

9. In combination, an outer nozzle, a valve within said nozzle, a spring pressure means forcing said valve open, a closing piston attached to said valve, said piston being within said outer nozzle and exposed to the free flow of liquid through said nozzle, and a conduit for leading said flow of liquid into said nozzle, said conduit being positioned to drain liquid away from the upper face of said piston and relieve pressure on said piston, whereby the submergence of the nozzle end interrupts the free flow of fluid over said piston and the trapped fluid force causes the piston to close said valve.

10. The invention of claim 6, characterized by of said nozzle end will interrupt said discharge the further fact that said inlet port is controlled by a slide valve which rides on top of said piston and has an axial conduit which becomes radial at the outer end of the slide valve.

11. In combination, anfouter nozzle, a valve within said nozzle, a pressure means forcing said valve open to allow fluid discharge therethrough, a closing piston within said nozzle and exposed to the free flow of fluid through said nozzle and at-- tached to said valve, and an exhaust duct for leading said fluid away from said closing piston for the discharge of said fluid at substantially the lower end of said nozzle with the fluid discharging through said valve, whereby the submergence valve is closed.

and back up the pressure of said fluid stream on said closing piston to close said valve.

12. The invention of claim 11 charaoterlzedfurther by the fact that the upper face of said 5 valve is positioned in the fluid stream and exposed to the flow or fluid through said nozzle except when said valve is in the open position and that there isan additional valve member which automatically cuts oil the flow of fluid 10 to said closing piston when said first mentioned HENRY x. FLINCHBAUGH. 

